Mantles for gas-burners.



PATENTED DEC. 8,1903 E.v LIPPITT'z W. G. WHITGOMB.

MANTLES FOR'GVAS BURNERS.

N0 MODEL.

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UNITED STATES Patented ecember 8, 1903.

PATENT OEEICE.

ELIHU LIPPITT AND WILLIAM C. WHITCOMB, OF CHICAGO, ILLINOIS, AS-

SIGNORS ILLINOIS.

TO GEORGE D. WHI'ICOMB COMPANY, A CORPORATION OF MANTLES FOR GAS-BURN ERS.

SPECIFICATION forming part of Letters Patent N o. 746,536, dated December 8, 1903. Application led December 23,-1902. Serial No. 136.378. (.No model.)

To all whom, it may concern.-

Be it known that We, ELIHU LIPPITT and WILLIAM GWHITCOMB, citizens of the United States, and residents of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvementsin Mantles for Gas-Burners, of which the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof. l A

Incandescent lnantles are generally made by taking a properly-shaped frame or support of a readily-combustible network or fabric, such as cotton, and subjecting the same to the treatment of certain incombustible mineral substances and then exposing it to heat, so that the fabric frame or support is consumed, leaving a skeleton mantle consisting of the incombustible and infusible material resulting from the decomposition of the substances employed for iinpregnating the fabric.

The present' invention relates to the structure of the fabricated frames upon which the burner-mantles are formed and to the manner of securing thereto the hails by which the mantles are supported in use; and it consists in the features hereinafter particularly described, specifically designated in the appended claims, and illustrated in the accompanying drawings, in which- Figure l illustrates a plurality of the fabric frames as they emerge from the machine, one of the same being partially in section to show the bail thereof. Fig. 2 is a section on the line :c of Fig. l. Fig. 3 illustrates a single mantle-frame complete as cut from the tubular product shown in Fig. l. Fig.,4 is a detail of the connection between adjacent pairs of the mantle-frames, the View being taken ninety degrees removed from that appearing in Fig. l; and Fig. 5 illustrates a modification of the invention, showing a plurality of the incombustible supporting-hails knitted or woven into the wall of the fabric frame.

Heretofore these mantle-frames have been woven in cylindrical form and then fashioned by hand andthe s upporting loop or bail added. The frame herein shown and described is or may be fashioned in the fabrication thereofthat is to say, given the conventional shape of the completed mantle during the operation ofconstructing the same-*and the bail-thread is incorporated into it at the same time. Preferably the fabrication is a knitting process,

as illustrated, and in that case the frames are made in continuous succession and come from the machine connected together, as shown in Fig. l. They are separated by cutting away `the connecting-webs and are then ready for end of the frame and are united to form thel upper end of the succeeding mantle and give it the tubular shape.

Located at the upper end of each of the body portions l0, as shown in the sections, Figs. l and 2, is a strip, cord, or thread l2 of incombustible material, such as asbestos, and the ends of such strip, cord, or thread extend down and are knitted or woven into the walls of the said body portion, arching over or crossing the upper open end of the mantle and providing a bail therefor.

As shown in Figs. 1 and 2, although the manner of binding the ends of the bail l2 in the mantle-frame is immaterial so long as it is knitted or woven into or otherwise incorporated with the fabric forming the same, each end of the thread or strip passes through and is retained by a row of loops, as shown in Fig. 2.

Instead of a single bail l2 a pair of the same may be employed and arranged as shown in Fig. 5, the ends of the additional bail being knitted or woven into the fabric in the same manner as the other bail.

Before treating the fabric frames with the substances to provide an incombustible mantle each body portion is cut from its neighbors. The fabric frame is then impregnated with the proper substances, and when dried and subjected to heat, s that the fabric frame will be consumed, the full-fashioned completed skeleton mantle will result provided with a bail, the ends of which will be cemented in or inclosed by the Walls of the mantle. The bail being knitted or Woven into the fabric of the body portions l0 is protected by the material inclosing the same. This is a decided advantage when a material, such as asbestos, is employed which would readilybreak up or be destroyed if exposed when the fabric is subjected to the necessary Washing and wringing in the preliminary stages of the treatment of the fabric.

We claim as our inventionl. As an article of manufacture, a fabricated gas-burner mantle-frame having a bail incorporated into the body of the mantle.

2. As an article of manufacture, a combustible knitted tubular fabric incandescent gasmantle frame having an incombustible strip knitted into the wall thereof.

3. As an article of manufacture, a combustible knitted tubular incandescent gas-mantle frame having a bail at the upper end comprising an incombustible strip the ends of Which are knitted into the frame at opposite sides' thereof.

4. As an article of manufacture, a combustible knitted tubularincandescentgas-mantle frame having a pair of transversely-disposed bails at the upper end thereof and each of which consists of an incombustible strip the ends of which are knitted into the frame.

5. As an article of manufacture, a full-fashioned gas-burner mantle-frame having a bail incorporated into its body.

6. As an article of manufacture, a plurality of full-fashioned gas-burner mantleframes each of which has a bail incorporatedintoits body in the fabrication thereof and the several frames being connected by a web.

7. As an article of manufacture, a plural-`v` ity of connected knitted incandescent gasburner mantle-frames each having a bail knitted into the frame at the en'd thereof.

8. As an article of manufacture, a plurality of connected knitted full-fashioned combustible gas-burner mantle-frames each having an incombustible bail-strip the ends of which are knitted into the Wall of-the frame.

9. As an article of manufacture, a plurality of connected knitted incandescent gasburner mantle-frames each having a pair of transversely-disposed bailsrknitted into the frame at the end thereof.

ELIHU LIPPITT. WILLIAM C. WHITCOMB.

Witnesses:

ARTHUR B. SEIBOLD, LOUIS K. GILLsoN. 

